NEET2024Chemistry-Atomic Structure
NEET 2024 Chemistry Energy Levels MCQ Question
Type: MCQ-numerical-Medium-Class 11
The energy of an electron in the ground state (n = 1) for He⁺ ion is −x J, then that for an electron in n = 2 state for Be³⁺ ion in J is:
A
−4x
B
−4/9 x
C
−x
D
−x/9
Correct Answer
Option C
Detailed Explanation
The energy of an electron in a hydrogen-like ion is given by E = −13.6 Z²/n² eV. For Be³⁺ (Z=4) in n=2, E = −13.6 × 4²/2² = −4/9 x.
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